Safety razor



. C. M. ROCKWELL June 13, 1939.

' SAFETY RAZOR Filed April 8, 1935 Patented June 13, 1939 UNITED STATESPATENT OFFICE 4 Claims.

The invention relates to safety razors in which a double-combed head orblade holder for doubleedged blades is positioned transversely orcrosswise to the end of the handle. The objects of the invention are:first, to pro-videmeans whereby, without removing the blade from thehead or holder, either edge of the blade may be brought to a workingposition of combined pitch and offset in relation to the handle for thepurpose of facilitating shaving; second, to provide facilities wherebythe first object may be accomplished by turning a knob at the base ofthe handle; third, to provide in a single unit, a double-combed head orblade holder designed to prevent mislaying of parts, to facilitatechanging of blades and to be easy to clean; fourth, to provide adouble-edged blade without perforations to avoid edge-distortion andrisk of breakage and to operate in conjunction with the double-combedhead or blade holder.

One form of the invention is illustrated in the accompanying drawing, inwhich Figure 1 is a conventionalized section of the entire safety razor.Figure 2 is a View of the underside of the head or blade holder from thepoint where it joins the handle at 66. Figure 3 is a view of the blade.Figure 4 is a longitudinal section of the head, comprised of thedouble-combed guard, the double-edged blade and the hinged cap.

Integral with the head is the neck 23, which neck is jointed to thehandle at the inclined surface 66 by the pin 5 which has a turning fitin the end of the rod I.

When the knob I2 at the base of the handle is turned to the left on themachine threads I9 of the rod I until the knob meets the stop I3 at thebase of the rod, the further turning of the knob to the left revolvesthe rod, causing the head of the razor to rise and revolve on thehighest point of the inclined surface 6 6, against the compression ofthe coiled spring 8. When the end of the pin 5 passes the highest pointof the inclined surface B-- :3, the compression of the coiled spring 8snaps the head around for the remainder of the half turn. By turning theknob I2 to the right on the machine threads I9 of the rod I until theknob bears tightly against the base of the handle It as shown at 24Z4,the head of the razor is locked firmly in its new position.

Figure 4 shows how one end of the cap I is hinged to the guard at I6,and the other end of the cap is provided with a projection I4 whichengages the underside of the guard at 22 when 55 the cap is closedagainst the compression of the sides of the flexible blade. Theright-angle tabs- 4 and I5 at the ends of the hinged cap fit snugly intoshallow rectangular notches in the ends of the guard as shown at2I'I-2ll. At 2I-2I the shoulders of the guard are beveled to facilitate5 the closing of the cap against the guard. with the blade in place. I

In Figure 1, at 33, is shown how the compression of the sides of theflexible blade between the cap and the guard provides the necessary 10pressure against the cap and holds the projection I4 tightly against theunderside of the guard at 22.

The blade, Figure 3, is designed without perforations to avoidedge-distortion and risk of 15 breakage, and to afford the requisitedegree of flexibility. In fitting the blade to the head or holder, thehead is opened with the cap in the horizontal position as shown inFigure 4 and the blade is dropped in place with the notches 20 I'III--II--I'I fitting inside the right-angle tabs 4 and I5. Notches I8-I8 in theends of the blade provide clearance for the locking projection I I asshown by the dotted arc lines.

I claim: 26

1. In a safety razor, a head or blade holder for double-edged blades,the plane of which head is positioned at a pitch and offset in relationto the handle and which head is rotatably adjustable on a cam at the endof the handle by means of being pivotally connected to a revoluble shaftextending lengthwise through the center of the handle to a knob at thebase of the handle, and the action of the whole being assisted by springmeans within the handle. 35

2. In a safety razor as claimed in claim 1 the arrangement in which theknob at the base of the handle is connected by machine threads to therevoluble shaft extending lengthwise through the center of the handleand which shaft has a 40 boss or stop at its end limiting the movementof the knob on the shaft, to provide means whereby the head may berotated by turning the knob to bear against the stop and may be lockedin position on the cam at the end of the handle by turning the knob tobear against the base of the handle, substantially as set forth.

3. In a safety razor as claimed in claim 1 the arrangement of a helicalspring positioned about the revoluble shaft within the handle andbearing in compressed tension between a collar or flange on the shaftand the inner cam-end surface of the handle, to assist the action ofrotating the head on the cam at the end of the handle and to 55 draw andhold the head in position against thesaid cam, substantially as setforth.

4. In a safety razor as claimed in claim 1 the arrangement in which therevoluble shaft is extended through the cam at the end of the handle andis pivotally connected to a. neck integral with the head member,providing means whereby the head is positioned at a pitch and oifset inrelation to the handle and may be rotated on the cam to bring eitheredge of a double-edged blade into working position for shaving,substantially as set forth.

CHARLES M. ROCKWELL.

